noun, noun which may take the genitive case particle 'no'
the extraordinary; the unusual; the unexpected
Refers to things outside everyday life, often with a nuance of special, non-routine, or extraordinary events. Commonly used in contrast with 日常 (everyday life).
Traveling is a good opportunity to experience the extraordinary.
I experienced the extraordinary while traveling.
He was excited by the unusual event.
Travel is a gateway from the everyday to the extraordinary.
Hotels that offer extraordinary experiences are popular.
非常 means 'extreme, emergency, or unusual (in degree)' as in 非常事態, while 非日常 specifically means 'outside of everyday life'—learners often mix up the two because both start with 非.
異常 means 'abnormal' and usually carries a negative, problem-indicating nuance, whereas 非日常 is neutral or even positive, describing a pleasant break from routine like travel.
Compound of 非 (hi, 'non-') + 日常 (nichijō, 'everyday'). The prefix 非 negates the following noun, creating the meaning 'non-everyday' or 'extraordinary'.